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Nomenclature
Hypericum tenuicaule Hook.f. & Thomson ex Dyer
Nomenclature
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Genus: HypericumSection: sect. Ascyreia
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Synonyms: 3
DIAGNOSTIC DESCRIPTION
Shrub c. 1-5 m tall, bushy, with branches ascending to arching, not frondose. Stems red, 4-lined when young, soon terete; internodes 8-14 mm, shorter than leaves; bark reddish-brown to grey-brown. Leaves petiolate, with petiole 0-5-2 mm long; lamina 15-58 x 4-19 mm, lanceolate to rarely elliptic, acute to rounded, not or scarcely apiculate, margin plane or rarely undulate, not incrassate, base cuneate to angustate, ± glaucous beneath, chartaceous; venation: 2-3 pairs main laterals, with midrib branched distally, without visible tertiary reticulum; laminar glands streaks and dots; ventral glands dense. Inflorescence l-4(-7)-flowered, from 1(2) node(s), corymbiform, with short (sometimes very short) apical internode, without flowering branches from middle of current stem; pedicels 9-15 mm long; bracts squamiform, acute, deciduous. Flowers 15-30 mm in diam., ± deeply cyathiform; buds subglobose, obtuse to rounded. Sepals 4-5 x 1.8-2.3 mm, free, subimbricate, equal, erect in bud and fruit, oblong to oblong-spathulate, rounded or rarely with minute apiculus, with margin entire or minutely eroded-denticulate (and then hyaline); midrib obscure or indistinct, veins not prominent; laminar glands linear, numerous. Petals bright yellow, sometimes tinged red, ± incurved, 10-13 x 8-12 mm, c. 2-5 x sepals, obovate to subcircular, with apiculus subterminal, rounded or almost absent; margin entire, with or without a few intramarginal or marginal gland dots. Stamen fascicles each with 30-35 stamens, longest 5-7 mm long, c. 0.5 x petals; anthers bright yellow. Ovary 4-5 x 2.5-4 mm, ovoid; styles 3.5-6 mm, 0.9-1.2 x ovary, erect, straight or outcurved very near apex; stigmas small. Capsule 8-11 x 4-7 mm, ± broadly ovoid. Seeds dark brown, 0.7-0.8 mm, cylindric, not carinate, shallowly linear- foveolate.